View Single Post
beepbeep beepbeep is offline
Registered User
beepbeep's Avatar
Join Date: Jun 2001
Location: Sweden
Posts: 5,564
Originally Posted by 911nut View Post
Goran, what's the difference between using a spring vs. a boost controller?
Boost controller is adaptive and can be adjusted upwards or downwards depending on state of engine or ambient temp. Spring is permanent and requires dissassembly of wastegate bell. Removal of wastegate can sometimes be a frustrating process as things age.

Also, boost controller can only raise boost above the spring-tension controlled boost (often called "base boost").

So keeping a 0.7 bar spring and raising boost additional 0.3 bar with some variant of boost controller is much easier process than disassembling wastegate and fitting 1 bar spring.

There is an issue of harder wastegate spring preventing "wastegate creep". This is debatable issue and my personal opinion is that fitting harder spring to fight wastegate creep is collosal solution to somewhat nonexistant problem. Eventual boost creep can also be fought with EBC that doesn't introduce boost to wastegate bell untill boost reaches preselected value.
Thank you for your time,
Old 04-28-2008, 02:23 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)